A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
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A.Papagayo
B.fall wind
C.foehn
D.williwaw
A.Tehuan tepecer
B.Papagayo
C.Norther
D.Pampero
A.crossing
B.transit
C.transfer
D.passing
A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake
A.chute
B.stabilized channel
C.slough
D.navigable pass
最新試題
The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
The direction of the surface wind is（）.
In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the（）.
The length of a wave is the length（）.
The cold ocean current which meets the warm Gulf Stream between latitudes 40°and 43°N to form the cold wall is called the（）.
In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is available. The best course of action is to bring the wind on the（）.
The direction of the southeast trade winds is a result of the（）.
In most cases，the direction of the apparent wind lies between the bow and（）.
In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n)（）.